Method of applying molten solder to sheet metal.



No. 875,507. PATENTED DEC. 31. 1907 W. G. DAUGHERTY. METHOD OF APPLYING MOLTEN SOLDER T0 SHEET METAL.

APPLICATION FILED 0OT.13. 1905.

is A. LA.

METHOD OF EEGLTEN' SGL'DEE "9G S21E33? mTAL.

Specification of Letters Patent.

Eaten Dec. 31, 1937;.

Application filed Gotcha: 13, 1905; Serial lie. 232,580-

To all whom it may concern:

Be it known that 1; WILLIAM G. DAUGH- EBTY, a citizen of the United States, residin at Baltimore, in the State of Maryland, have invented certain new and useful Irn' rovements in Methods of Applying Molten older to Sheet Metal, of which the following is a specification. My inyention has for its object to apply .0 solder in a molten state to can-ca s, can.-

bodies or other articles so that it wil remain thereon in the form of a film, bead or here, ready for a subsequent soldering process by which the ca is united with a can body or L5 the edges of t e can body joined together.

The invention consists in the etc )5 and procedure hereinafter described and c aimed. In carrying the invention into practical efiect I may employ a paratus more or less well known, and, in orc or to make the nature of the invention clearly understood, 1 have shown in the accompanying drawings one form of a paratus suitable for the purpose.

In sai drawingsFigure' 1 is a vertical sectional view of a mach ne or apparatus for applying molten solder to sheet metal, ac-' cording to my invention, the said machine bein specially adapted for such application of so der to can caps. Fig. 2 is a sectional view-,on a larger scale, of the dies between which the caps are held during the process, showing also a cap held in place between the dies and a film or head of solder which has been applied to the cap. Fig. 3 is a perspec- 35. tive view of what I term the inner die. Fig. 4 1s a similar view of the outer (he. Fig. 5 is a perspective view of a can cap having a film or bead of solder thereon.

It will be understood that the separates will or can be suitably modified, especially as to the shape of the metal-holding means or dies, When'the-process is to be carried out with can bodies or other articles.

Referrin to the drawin s, l. is s receptacle for molten solder in hich the latter is kept fluid by a heating means 2, here shown as consisting of gas burners. I

, 3 is a cylinder or pressure chamber Within the rece tacle, in which fluid solder is re ceived t ough a check valve 9 and where pressure is applied to the same by a piston 4. actuated by a rod 5 and lever 6. The operation of the valve 9 is such that the which flows freely through it when the piston is raised is prevented from flown he cl: w on the piston is depressed, is consequently mounted on a bracket or lug 26; By jdee solder I forced through a duct 7 and tube 16 to an outlet or nozzle 8, where it is applied to the can cap or other article. 7

. 12 is the inner die having a recess 1-1 in which the tube 10 its closely-w the two J dies are carried towards and against thetuba 18 is the outer die on or within which the inner die rerhovably fits, and which is et;- tachcd to an arm 19 pivoted to a bracket 'or 6 5 lug 23. {if 24 is a spring applied so as to tend to. hold the dies away from the tube 10.

25 is a. lever which is or othe Wise constructed to press'the arm leendt dies and their contained cap against t tube 10.

2'? is a lever or handle for the actuation the arm 19, the said lever 25-heing pivo pressing the handle 27 the lever 25 is caused," to release the arm 19, whereupon the'spring 24 will press the arm outward and cf the dies to a sufficient distance from the tube is. to allow the inner die to be removed and a cap to be inserted between the dies,; or re. moved therefrom... o posing faces of the said inner'and outer esare iroperly shaped, according to the contour o the cap or other article to be para-ted upon, to fit so such article, and leave a space in which sol-. der confined and applied to the article. In the construction illustreted I have shown a cap form with bead at or near its periphery, which best. fitted by a coifre spending head 21 on the innersurface oithe outer die. 'ihe er die also has a peripheral flange 'Wltl'llEl which fits the can cap. and also a so rewhat sirriler flange 15 of the inner die. within the flange 15 is an "ed sham? flange or ring 14, formed on the outer face of the inner die, so to leav l I n the flanges Mend 15'. a space 1 3. th. this space communicates. the outlet through an orifice 2,8. The flan e e is oi such height es to meet and fit firm upon the inner face of the cap, as indi: cats in Fig. Zin which it is'shown as hearing" upon the head 22.

By parts described shove the space a 16 is entirely inclosedexcept where it is entered by t as 28, so that the solder, forced throne" said orifice by appliences is confined with: the do contact wit the ale 0 end around an where adheres end till cools to a solid state. On can caps the solder may thus be applied along an annular portion of the face of the cap, or it may be sipraising the handle 6 and when the solder has set in a solid state in a film or bead around. the surface of the cap, the handle 27 is depressed to allow the retraction of the dies and the removal of the inner die, and the fit fini'shedcap is removed "from the outer die,

to be replaced by,.another cap for the repetition of the process. I

WhatI claim is; i 1 The herein described method of applying a head or film of solder to can. caps and similar articles, consisting in confining and holding the cap or other article to be soldered, leaving exposed tothe solder only that portion of the cap or other article Where the solder is to be applied, and then forcing m'olten solder under pressure to the said exposed portion and while the solder is confined thereon.

2. The herein described method. of apply- I ing solder to can caps and similar articles, consisting in confining the entire cap or artiole Within a mold or receptacle with the periphery exposed to the entrance of solder and then forcing solder in a molten condition into the mold or receptacle, so as to cause the solder to flow around the exposed periphery of the can cap or similar article and while the solder is confined thereon.

3. The herein described method of applying solder to sheet metal, consisting in applying the solder in a lluid. condition, confining the solder on the sheet metal, and subjecting the confined solder to pressure, so as to cause it to flow along the sheet metal.

4. The herein described method of applying solder to sheet metal, consisting in holding the sheet metal with a ortion of the same exposed, applying the so der to the said WILLIAM G. DAUG-HERTY.

Witnesses H. N. Low, T. BAYARD VVrL'LIAMs. 

